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Lubrication for worm reducer

Lubrication

A lubricant is used to reduce the friction of
bearings and sliding surfaces in worm reducer and thus diminish the
wear,heat,and possibility of seizure of the worm gear reducer.Although a layer of
oil will eliminate the excessive friction of metal-to-metal contact,the
friction within the oil film must be taken into worm reducer.The study of
lubrication and the design of bearings is,therefore,concerned mainly
with phenomena related to the oil film between the worm gear reducer.The
literature on lubrication is very extensive,and a mathematical treatment
of the subject is beyond the scope of this content.Fortunately,it is
possible to make design calculations from the graphs obtained by
mathematical analysis.

Load-carrying journal bearing, and worm reducer.

The
flat plate in that is incapable of supporting a vertical load because no
pressure exists in the oil film.If a vertical load were placed on the
plate,the oil would squeeze out around the edges,and the plate would
approach the surface beneath,resulting in metal-to-metal
contact.If,however,the plates of worm gear reducer are tipped at a small angle to each other,
the oil will be drawn into the wedgeshaped opening,and sufficient
pressure will be generated in the film to support the load W.This fact
is utilized in the thrust bearings for hydraulic turbines and propeller
shafts of ships,as well as in the conventional journal bearing with
flooded-oil lubrication for worm gear reducer.

Since the same quantity of oil is drawn
past each cross section of worm gear ,the velocity distribution throughout the height
of the film is no longer linear as it is for parallel plates.The
velocity curve will be concave at the wider cross sections of worm reducer and convex at
the narrower.

If the shaft of worm reducer in that carried a downward load,the
journal would no longer remain central with the bearing.For the
classical case of the infinitely long bearing,the shift of the journal
cencenter is usually expressed as a proportion of the radial
clearance,c.Thus,the shaft has shifted inches,where the eccentricity
ratio is pure number less than unity.A copious of worm gear reducer supply of oil is
assumed,which fills the entire clearance space,and thereby builds up
sufficient pressure to support the load W.The bearing automatically
adjusts itself to the imposed load.Thus,should W be increased,the shift
to the left would become greater,and the resulting decrease of the film
thickness would cause higher oil pressures,which would take care of the
larger load.